{"id":"CVE-2026-85734","title":"LightRAG provides simple and fast retrieval-augmented generation","summary":"LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication atte…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-307"],"vendor":"HKUDS","product":"LightRAG","affected":["LightRAG < 1.5.5"],"published":"2026-09-22","updated":"2026-09-22","sourceUpdated":"2026-09-22T18:17:23.530","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85734","references":[{"url":"https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/pull/3424","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85734"},{"url":"https://github.com/advisories/GHSA-frch-4w6v-q5xx"},{"url":"https://github.com/HKUDS/LightRAG"}],"tags":["nvd","cve.org","ghsa","pip","osv"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-22T17:36:54.076707Z"},"ingestedAt":"2026-09-22T17:07:07.383Z","aliases":["GHSA-frch-4w6v-q5xx"],"ecosystem":"pip","patched":["lightrag-hku 1.5.5"],"epss":0.00355,"epssPercentile":0.26516,"slug":"CVE-2026-85734","body":"## Overview\n\nLightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication attempts. A network attacker can submit password guesses at full request speed until a valid account password is found. Successful credential recovery grants authenticated access to documents, the knowledge graph, and administrative operations. This issue is fixed in version 1.5.5.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-85734)\n\nAffected packages:\n\n- `lightrag-hku < 1.5.5`\n\nPatched in:\n\n- `lightrag-hku 1.5.5`\n\nSource: https://github.com/advisories/GHSA-frch-4w6v-q5xx","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}